Chroma key compositing, or Chroma keying, is a special effects / post-production technique for compositing two images or video streams together based on colour hues

when using the Chroma key on final cut pro its hard to get clear back ground due to my lack of experience, the back ground has a slightly fizzy texture on the background , Also there is a a visible difference in the lighting  in the corner.
with help from YouTube I have learnt how to remove the technical difficulties for next time i am editing for my actual music videos.

(disclaimer not the song I lip sink to )This is the actual final first try at using the Chroma key on final cut pro 

 I tried an experiment of using the Dolly with the Chroma Key this is to try and create different aspects and effect by combining two different techniques also , at the end of this experiment if found that it could be done but I will possibly have to attach the green screen on the dolly , this is also something I will have to experiment with to get maximum potential out of it .